Pavement-cutting machine.



A. H. PEDRICK.

PAVEMENT CUTTING MACHINE.

APPLICATION FILED JAN. 18, l9l6.

Patented July 9, 1918.

4 SHEETSSHEET l.

A. H. PEDRICK.

PAVEMENT CUTTING MACHINE.

APPLICATION FILED IAN. IB. I9I6. Patented 9,

4 SHEETSSHEET 2.

ms NORRIS wmzxs co.. PHIJTO-LITMO.. wasnnvcruu. o. c.

A. H. PEDRICK.

PAVEMENT CUTTING MACHINE.

APPLICATION FILED JAN- 18, I916- 4 SHEETS-SHEET 3.

A. H. PEDRICK. PAVEMENT cimme MACHINE. APPLICATION FILED 1AN.l8. 1916.

1,271,757. Patented July9, 1918;

4 SHEETS-SHEET 4.

ICE-E- zrsns m. max-"mums wAsnmomM o. 0..

ALBERT H. rnnaIcK, or SPRINGFIELD, onro.

PAVEMENT-CUTTING MACHINE.

Application filed. January To all whom it may concern:

Be it known that I, ALBERT H. PEDRIOK, a citizen of the United States, residing at Springfield, Clark county, State of Ohio, have invented certain new and useful Improvements in Pavement-Cutting Machines, of which the following is a specification.

This invention relates to machines for cutting asphalt pavements or pavements of like composition, particularlyv to machines adapted to cut a groove or channel through an asphalt or similar surface in the partial or whole destruction of a street pavement for repair or reconstruction purposes.

The object of this invention is to provide a machine which will cut a channel through the surface Crane pavement quickly and with a minimum of power expenditure and of supervision by attendants and which may be quickly and easily transported from place to place in the operation of street repair or reconstruction gangs.

In the accompanying drawings in which one form of my invention is shown in detail,

Figure 1 is a top plan view; Fig. 2 is a side elevation; I Fig. 2 is a perspective view of the propelling device for the machine;

- Fig. 3 is a front 611(1 .Vi6W of the" machine with part of the mechanism in section;

Fig. 4 is a detail illustrating the cutter tooth construction;

Fig.5 is a section on Fig. 1. i

Fig. 6 is a side view of another embodimentof the invention.

Referring toiFigs. 1, 2. and'3 of the draw -ings, 10, 10 represent apair of'road wheels, supporting a shaft or axle .11. A heavy frame 12is j ournaled .at one end on the shaft 11 and extends forwardly therefrom after the manner of a wagon frame. This heavy frame has downwardly extending arms 13 r and 1 1 at its forward end which carry a shaft 15, this shaft being held from rotation by pins 16 and 17 'which pass through the arms 13 and 14 and the shaft. Keyed to this stationary shaft 15 near the middle-thereof is a bracket or spider 18 on which are journaled. two pinions 19 and 20. J ournaled on the opposite sides of the bracket 1-8. are two cutter wheels 21 and 22, which are provided on their inner sides with gear teeth adapted to engage the pinions 19 and 20. The cutter 55.wheels arev provided, ontheir peripheries with series of'cutter-teeth 23 attached therethe line 5-5 of Specification of Letters Patent.

Patented July 9, 1918.

s, 1916. Serial No. 72,764.

to by bolts 24, these teeth projecting a distance beyond the periphery of the cutter wheels to act as saw teeth in the cutting of the pavement. Bolted to a flange 25 rigid with the cutter wheel 21 or otherwise suitably rigidly attached to this cutter wheel is a worm wheel 26 which is caused to rotate in the cutting operation of the machine, thereby rotating the cutter wheel 21 in the same direction on the shaft 15. The cutter wheel 21 imparts its rotary motion by means of its internal teeth to the pinions 19 and 20 which rotate the cutter wheel 22 in a direction opposite to the direction ofrotation of the cutter wheel 21. The teeth of the cutter wheels being close together cut the material which they engage in a manner similar to that in which a pair of scissors operates. Tli'e'moveinent of-thecntter wheels in oppo: site directions tov cut the asphalt pavement prevents the cutting action from imparting a longitudinal movement to the machine as a. whole, andhas the added advantage that the teeth in passing one another knock off from each other any particles or lumps of asphalt or other material which may be clinging to them, thus keeping the cutting portions of the teeth free from matter which might impair their cutting action. Meshing with the worm wheel 26 is a worm 27, which is mounted on a shaft 28 journaled in the rame, 12 of the machine at the ends thereof. At one end of the shaft 28 is abevelgear 29 which meshes with a bevel gear 30 rigidly attached to a sleeve 31'journaled on the axle 11, this sleeve 31 being rigidly attached by any suitable means to a pulley 32 also journaled on the shaft 11. Totake up the end thrusts in the worm shaft roller, thrust bearings 33 and 34 are placed at the end of the worm shaft adjacent thecutter wheels. The pulley 32 is driven by a belt 35 from a motor-36 which may be of any suitable type such as an electric or internal combustion. Themotor 36 is mounted .on a,plat form 37 ,suspended at one end from the axle 11 and extending forwardly under .the frame 12 to a point adjacent the cutter wheels where it is supported from the ground by a swivel wheel 38, saidplatform being always in a horizontal position. Extending directly upward from the end of the frame 37 above wheel38 is a threaded rod 39 which extends above the frame 12 of the machine and passes through a bracket 40,

which is rigidly attached to the frame 12 by means of bolts ll and 42. Immediately below the bracket and mounted on the threaded rod 39 is an interiorly' threaded hand wheel 43 adapted to abutagainst the lower part of the bracket 40am to rise and lower, through its rotation about the. rod 89, the heavy-frame 12 of the machine and the cutter wheels. f. i

In the operation of cutting, the hand wheel is so adjusted that the frame and cutter wheels are lowered until the teeth on the cutter wheels penetrate the pavement the necessary distance. lVhen, however, it is desired to niove the machine, the'hand wheel isturnedand the whole forward end of the machine, including the cutter wheels, is raised until the teeth no longer engage the ..pavement. 'When in this position the machine may be drawn from place to place, its entire weight resting upon the road wheels 10 and the swivel wheel 38. p

Any suitable means may be employed for slowly advancing'this form of the machine in operation. I have shown a propelling device mounted on the crank shaft or motor driving shaft andextending downward through anopening 61 in theplatfgrm ofw the framed'i on whi ch-the mow-scammed. The propelling mechanism has a frame 62 which has ayoke 63 at the upper end provided with bearings fitting on opposite sides of a Worm 64 on the shaft 60, the shaft 7 60 being rotatably mounted in opposite sides the asphalt;

" on the drive shaft60. The shaft 70 of the frame 37; The frame 62 is arranged so that it may oscillate on the shaft 60 and at its lower end it hasanother yoke 65 providedvwith suitable downwardly extending arms 66, forming bearings engaging the'oppositee'nds of a shaft 67 carrying the spiked *wheel 68 and the worm wheel 69, the worm wheel and spiked wheel being rigidly-securedtog'ether 80 as to rotate as one. The 'yokes 63 and 65 are provided on their upper sides with suitable bearingsjto support a shaft 70 which at its upper-end carries a 'worm wheel 71, meshing with the worm 64: I carries a'w'or1n' 7-2 at its lower end which meshes wyith'the worm wheel 69 connected to the spiked wheel 68'. Thespiked wheel engages "the" concrete at the bottom; of the groove cut'by the cutters 23 and is geared to turn slowly at about the speed necessaryto cut As'it requires little power to move the machineforward, asimple lever or handle 73' is suflicient to raise the propelling frame, should it be' necessary to back [up the cutting'machine in'order togoover some place a second time. The handle lever 7 3 is one arm of an elbow lever pivoted at 74: on a bar 7 5 which extends-across the-upper side of the fraime37. The lowerfarm 76 of the elbow is connected by a link 77' to the frame 62. Anotched segment 7 8 ismountedon the bar and a lockingdevice79' on the hanmounted on a pair of road wheels .is supported on brackets 50 whlch are secured "to the rear platform of a traction engine A by means of bolts 51; The shaft 11 is pref erably mounted in. bearings 52-" on the brackets having the upper halves 53 of the bearings removably secured to the brackets h y-bolts 54, 54-. The cutter may be thus -quickly detached fromthe traction engine 7 by unfastening bolts 54 and lifting the shaft 11 from the bearings. The operation of the cutting apparatus is the same in this modification as in the form previously described but the power for rotating the cutters is "in this case derived from the traction engine-A instead of from a separate motor on the cutter. The pulley 82- mounted on the shaft 11 is connected'with' a pulley 55 driven by the motor of the tractionengine by abelt56. I, or 3 By attac ingmy cutting device to-"a tracjtion engine a meansfor drawing the cutter alongfis provided as wel-l'as 'a' source of steady power for rotating the cutter wheels.

' Only one man isneeded in the operation of bothdevices and the" traction engine 1 is adapted to. movethe cutter rapidly from place to of work.

It is obvious that many changes" may be --made in" the details of construction and arrangement of my machine and henceT do place r01 operate ondifferent pieces M not wish toilimit 'm yself t0 the exactform I illustrated and described: V I r Having thus describedimy invention; what is claimed anddesired tobe secured by Let-- ters Patent iszu V 1. In a mach ne for cutting channels in pavement, the combination with supporting wheels, of a frame pivotally supported on a transverse aXis, a shaft mounted in-the forward 'end oftheframe, two'cutter wheels arranged closetogether and operatlng inparallel planes at right angles to' the shaft,

means for turning the cutter wheels in opposite directions simultaneously, and means for feeding the machine to cuta groove'in the pavement, said feeding means comprising atoothed wheel arranged I to travel in [for turning said wheel; u a 1 T 2 In a; machine for cutting channels in "pavement, the combination; with suitable thechannel formed-byfth'e cutters and means v supporting wheels, of a cutter frame, a fixed shaft mounted in the cutterframe, 'a spider fixed on said shaft, pinions mounted on ra- "dialbearings'onthe spider, cutter wheels on opposite sides of said fspider' provided with gear; teeth engaging said-pinions, the periph- "cries of said cu-tterwhee1s lying close t'd gether and being provided with cutters adapted to form a narrow channel in the pavement, and suitable gearing for turning one of said cutter wheels, motion in the opposite direction being imparted to the other cutter wheel through said pinions.

3. In a machine for cutting channels in pavement, the combination with suitable supporting wheels, of a cutter frame, a fixed shaft mounted in the cutter frame, a spider fixed on said shaft, pinions mounted on radial bearings on the spider, cutter wheels on opposite sides of said spider provided with gear teeth engaging said pinions, the peripheries of said cutter wheels lying close together and being provided with cutters adapted to form a narrow channel in the pavement, a worm and worm wheel for imparting a slow rotary movement to one of said cutter wheels, the other cutter wheel being driven in the opposite direction through the intermediate pinions, and means for imparting a slow forward movement to said machine.

l. In a machine for cutting channels in pavement, the combination with suitable Copies of this patent may be obtained for five cents supporting wheels, of a cutter frame, a fixed shaft mounted in the cutter frame, a spider fixed on said shaft, pinions mounted on radial bearings on-the spider, cutter wheels on opposite sides of said spider provided with gear teeth engaging said pinions, the peripheries of said cutter wheels lying close together and being provided with cutters adapted to form a narrow channel in the pavement, a worm and worm wheel for imparting a slow rotary movement to one of said cutter wheels, the other cutter wheel being driven in the opposite direction through the intermediate pinions, and means for imparting a slow forward movement to said machine.

5. In a machine for cutting channels in pavement, the combination with supporting wheels, a frame, groove cutting means carried by said frame, and means for feeding the machine to cut a groove in the pavement, said feeding means comprising a toothed wheel arranged to travel in the channel formed by the cutting means.

In testimony whereof I affix my signature.

ALBERT H. PEDRICK.

each, by addressing the Commissioner of Patents,

Washington, D. 0. 

